Solar activity continued at low levels. Region 588 (S15W26) produced the only activity of note this period - a C2 flare at 09/2040Z. This region underwent considerable decay in the past 24 hours, however, it still maintains a reverse polarity beta magnetic configuration. This is now the only region with visible sunspots. The remainder of the disk and limb was quiet.

Solar activity is expected to be very low to low. Region 588 is in decay but maintains potential for isolated C-class activity.

The geomagnetic field ranged from quiet to minor storming. The interplanetary shock associated with the 6 April CME impacted the ACE spacecraft at 09/0147Z. Solar wind speed increased from 450 km/s to near 570 km/s, and the IMF Bz component turned southward for some short periods following the shock arrival. The storm was short-lived with active to minor storm levels ending by 09/0900Z. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today.

The geomagnetic field is expected to range from quiet to minor storm levels. The CME associated with the C7 flare on 08/1017Z is expected to impact the geomagnetic field late on 10 April. In response, active to minor storm conditions are expected on 10 and 11 April. Quiet to unsettled levels with isolated active periods are expected on 12 April.

  觀測的       09 Apr 090
  預測的   10 Apr-12 Apr  090/095/100
  90天平均值        09 Apr 110

  觀測的 Afr/Ap 08 Apr  016/016
  估算值     Afr/Ap 09 Apr  015/018
  預測的    Afr/Ap 10 Apr-12 Apr  020/025-020/025-010/015